Got shoot action stuff building.

Still need to clean some stuff up and get it working and test it and all that fancy stuff.
diff --git a/frc971/constants.h b/frc971/constants.h
index 8222bbe..7d06a70 100755
--- a/frc971/constants.h
+++ b/frc971/constants.h
@@ -99,6 +99,19 @@
     double max_zeroing_voltage;
   };
   Claws claw;
+
+  // Has all the constants for the ShootAction class.
+  struct ShooterAction {
+    // Minimum separation required between the claws in order to be able to
+    // shoot.
+    double claw_shooting_separation;
+
+    // Goal to send to the claw when opening it up in preparation for shooting;
+    // should be larger than claw_shooting_separation so that we can shoot
+    // promptly.
+    double claw_separation_goal;
+   };
+  ShooterAction shooter_action;
 };
 
 // Creates (once) a Values instance and returns a reference to it.